No, it is not.
No, (it's) not. OR No, it (isn't).
It is a triangle.
(It's) a triangle.
It is a dog.
(It's) a dog.
It is a cat.
(It's) a cat.
What is the time?
(What's) the time?
I am sad.
(I'm) sad.
It is sunny.
(It's) sunny.
They are fish.
(They're) fish.
It is snowy.
(It's) snowy.
How is the weather?
(How's) the weather?
They are dogs.
(They're) dogs.
No, I do not.
No, I (don't).
No, I can not.
No, I (can't).
No, they are not.
No, (they're) not. OR No, they (aren't).
I am Doraemon.
(I'm) Doraemon.
There is 1 fish.
(There's) 1 fish.
It is blue.
(It's) blue.
It is 3 o'clock.
(It's) 3 o'clock.
They are cats.
(They're) cats.
What is your name?
(What's) your name?
I am happy.
(I'm) happy.
I am from America.
(I'm) from America.